What is Cycle Time? | Definition, Measurement & Optimization
Cycle time is the elapsed time to complete one unit at a process or station — from the moment work starts on a piece to the moment the same point comes round again. It includes everything inside that window: manual work, machine time, walking, and any waiting that occurs within the cycle. Two clarifications save most of the confusion around the term. First, cycle time is a property of the process, not of the customer — that is takt time. Second, a line does not have one cycle time; every station has its own, and the line's effective cycle time is the longest of them, because the constraint sets the pace regardless of how fast the others run.
Anatomy of the Chart
- Cycle boundary
- The fixed start and end point that makes two observations comparable.
- Manual time
- The operator working hands-on inside the cycle.
- Machine time
- Automatic running inside the cycle, whether attended or not.
- Walk and wait
- Movement and idle time that sit inside the cycle and count toward it.
- Spread
- Fastest to slowest across observations — the signal that standard work is missing.
How to Create
- 1
Fix the start and end point
Use the same definition for every observation. Inconsistent boundaries are the main reason two studies of the same station disagree.
- 2
Record several consecutive cycles
Under normal conditions; five is a minimum, ten or more where the work visibly varies.
- 3
Break the cycle into work elements
Manual, machine, walk, wait — rather than one figure. A total tells you the station is slow; the elements tell you why.
- 4
Calculate the average and the spread
The difference between the fastest and slowest cycle is often more useful than the mean, because it points at missing standard work.
- 5
Exclude abnormal events
Breakdowns, training and material shortages come out, or get recorded separately.
- 6
Compare the result against takt time
Cycle time on its own is a number; against takt it becomes a verdict on whether the station meets demand.
Video makes this considerably more reliable than a stopwatch: element boundaries can be set precisely, the recording can be reviewed, and a second engineer can check the split.
Example
An operator at an assembly station picks up components (3 s), places them on the fixture (4 s), tightens four screws (16 s), inspects (5 s) and places the finished part on the conveyor (2 s) — a cycle time of 30 seconds. Measuring twenty consecutive cycles, however, gives a range of 27 to 35 seconds with an average of 30.5. The spread matters more than the average here: the screw-tightening element accounts for almost all the variation, which usually means the sequence or the tool positioning differs between attempts rather than the work being inherently variable. Against a 33-second takt, the average says the station is fine and the spread says it misses the pace roughly a quarter of the time.
Explore Further
What is Line Balancing? | Methods, Benefits & Tools
What is MUDA? | The 7 Wastes in Lean Manufacturing
Cycle Time Calculator
Process Cycle Efficiency (PCE) Calculator
Yamazo Studio for Automotive Tier Suppliers | Video Analysis Software
Yamazo Studio for Medical Device Manufacturing | Process Analysis Software
Yamazo Studio vs TiCon | Video Time Study vs MTM Comparison
Yamazo Studio vs Time Prism | Video Time Study Comparison
SMED Software: Reduce Changeover Time and Increase Manufacturing Capacity
Work Measurement Software: The Complete Guide to Labor Standards and Manufacturing Excellence
Frequently Asked Questions
Take the template with you
We will email you the element time study template — station, element, category and five cycle columns, with worked example rows already filled in. The same email carries the Yamazo Studio demo links, in case you want to measure the same thing from video instead.